Planer



G. H. BENZON, JR.

PLANE R.

APPLICATION FlLED JUNE l8 I920.

1,380,699, Patented June 7, 1921.

3 SHEETS-SHEET1.

v George H .5522 072, (/r.

/ WJYM e. H. BENZQN, In.

PMNER.

APPLICATION EILED JUNE 18. 1920.

Ehtented June 7, 1921;.

3 SHEETS-SHEET 2.

FIG .4.

IIVVENIOR n A F H e n I To all whom it may concern marten statesear-stir @FFHQE.

GEORGE I-L'BENZON, JR., 0F JENKINTONN, PENNSYLVANIA, ASSTGNOR TO WILLIAMSELLERS & COMPANY, INC., 01 PHILADELPHIA, PENNSYLVANIA, A CORPORA- TIONOF PENNSYLVANIA.

reac es.

Be it known that I, GEORGE Jr., a citizen of the United States, residingat Jenkintown, county of Montgomery, and State of Pennsylvania, haveinvented a new and useful Improvement in Planers, .of which thefollowing is a full, clear, and exact description, referencebeing had tothe accompanying drawings, which form a part of this specification.

This invention relates to an improvement in automatic feeding mechanismfor the cutting tool of a metal-working machine, and is moreparticularly designed for use in connection with metal planers in whichthe bed to which the work is clamped is reciprocated below the tool.

The object of my invention is to provide electrically at the end of eachmovement of.

the table. The electric means comprises a solenoid which when energizedwill move the 'escapement lever in one direction and when deenergizedwill permit theescapement to be moved in a reverse directionbymechanical means, the arrangement being such that the circuit to thecoil of the solenoid is closed during. one stroke of the-table and isbroken duringthe other stroke. I also provide a second magnet orsolenoid for preventing the escapement lever from returning by gravityif the circuit to the above mentioned solenoid is broken.

The nature of my invention will be best understood by reference to theaccompanying drawings, which will now be described, it being premised,however, that various changes may be made in the details of constructionand the general arrangement of the parts, without departing from thespirit and scope of my invention as defined in the appended claims.

F gure l of the drawings is a side elevas H. BENzoN,

PLANER.

' Specification of Letters Patent. Patented June 7, 1921.

- Application filed June 18, 1920. Serial No. 389,812.

tion of a portion of a planer with a portion broken away for clearness.i

Fig.2 is a diagram of an electrical controlling device embodying myinvention. I

'Fig. .8 is a horizontal sectional view of the planer showing the tabledrive.

' Fig.4: is a cross-sectional view of Fig. 3. V .Fig. 5 1s across-sectional'view of the feed" mechanism clutch and driving pulley.

Fig. 6 is an endview of the clutch shown v i V in Fig. 5. v

Fig. 7 is a sectional view on the line 7-7 of Fig. 5.

Fig. 8 1s a detail view of the locking mechi anismon a larger scale.

In the drawings the reference character a designates the bed of theplaner on which the table 7) is adapted to reciprocate, and secured tothe table is a rack 0 which meshes with a gear (Z;

The gear d meshes with a pinion on a gear it connected to a shaft 6, andf, f are1fast pulleys secured to the shaft 6, said pulleys being onopposite sides of a pair of loose pulleys g, g. j is a driving pulleywhich may be driven from any suitable source of power and which isconnected to the various pulleys f, f, g, g by means of a pair of beltsi, one of whlch is crossed, and are arranged to actuate the train ofgears before described, for

reciprocating the bed. Slidably mounted in suitable brackets on theframe of the machine is a belt shifter 70, which is arranged,

to shift the belts 2', to place both of said belts on the loose pulleysg, or one of said belts on a loose pulley and the other on a fast pulleysuitable bearings in projections on the frame a is a vertical shaft 19'and connected to the inthe well known manner. -Mounted in I crank 0which is at right angles to the crank g, and connected to this cranko'is a shifting rod 11, the other end of which is connected to a lever mpivoted on the bed a. The upper end of this lever 97?. is providedwithtwo projections out of vertical alinement with each other and whichare arranged to be engaged by adjustable dogs Z, Z connected to thetable 22.

Pivotally connected to the bed a adjacent to the lever m is a hand lever1', which is necte y eans of a link -5 with the er,

m, and is adapted for shifting the mechanism by hand when it is desiredto stop the machine or reverse its motion between the limits of themovement of the table 5.

u is the cutting tool which is connected to the tool head 42 in anydesired manner, which is movably mounted on the cross rail 00, and alongwhich it is adapted to be moved. to shift the tool between cuts.

The cross rail m is adjustably mounted on suitable guides on the housing3 and is arranged to be adjusted thereon for shifting the cross railtogether with the tool head vertically with relation to the work pieceto be machined on'the bed I). The tool head 41 is arranged to beadjusted or fed longitudi nally along the cross rail The screw shaft orfeed screw in action is actuated between cuts by ratcheting mechanismcarried by the gear wheel w on the end thereof and which mechanism isclearly disclosedv in my Patent No. 911,566. The desired feeding pinionw is continuously in mesh with the teeth on a sector 2, which isjournaled on a stud shaft connected to the cross rail :0. 3 is a crankconnected to the sector 2 and which s is also connected by means of alink 9 to a. disk 7, the connections between the link 9 and the disk 7being arrangedto permit radial adjustment in order to vary the throw ofthe lever 3 and consequently vary the feed of the tool. The disk 7 isalso connected to a shaft mounted in a bearing on a bracket extendingfrom the cross rail, and connected to this stud shaft is a bevel gearwhich is in mesh with a second bevel gear 6, splined on a shaft 5. Thebevel gear 6 is also carried by the cross rail at, so that when thecross rail is adjusted vertically, the before described mechanism ismoved vertically on the shaft 5. This shaft is rotatably mounted insuitable bearings on the housing 3 and is arranged to be driven by bevelgears 10 from a shaft 11, which is also journaled in bearings on thehousing 3 Rotatably mounted on the shaft 11 is a pulley 12 which iscontinuously driven from any suitable source and which is recessed forthe reception of clutching mechanism as clearly shown in Fig. 5.Connected to the shaft 11 is a clutch member 13, the end of which eX-tends into a. recessed portion of the pulley 12, and is provided withcam surfaces 32 as clearly shown in Fig. 7. Rotatably mounted on themember 13 is a sleeve 15 which is providedwith four projections 8 whichextend into the recessed portion of the pulley 12, and 16 are rollersbetween the projections 8 and which are arranged to lock the pulley 12to the member 13 when the rollers are moved along the cam surfaces onthe end on the member 13. 14 are springs one end of each of which isconnected to the sleeve 15, while the other ends thereof are con nectedto pins 17 extending outwardly from 'pivoted at 23.

the clutch member 13 and which pins ex- -tend through openings 18 in thesleeve 15.

These springs tend to draw the roller 16 on the high portions of the camwhen released by the escapementlever to lock the pulley 12 to the clutchmember 13. 19 are projections on the periphery of the sleeve 15 andwhich projections are out of alinement with each other, for the purposehereinafter described. Mounted in any desiredmanner on the housing y ona pivot pin parallel with the shaft 11 is an escapement lever 20 havingthree arms, one of said arms being in the line of travel of one of'theprojections 19, while another of said arms is in line of travel of theother projection 19, as clearly 20 is pivotally connected to the end ofthe core of a solenoid 21, the lower end of which core is pivotallyconnected to a lever 22 24: is a projection 011 the lower face of thelever 22 which is adapted to rest on a roller 25 on the upper end of alever 26 pivoted at 27, and connected to this lever 26 is the core of asolenoid 28. 29 is a source of energy which is in circuit with thesolenoids 21 and 28 and a main switch under the control of a switch armt, and 31 is a hand switch in the circuit of the solenoid 28. One end ofthe switchlevert is also connected to the end of links's so that wheneither the hand lever r or lever m is shifted the switch will be thrownas hereinafter de-' stance, to the right, which will close the circuitthrough thesolenoid 21 and the mechanism is so timed and connected thatthe table will move to the right and at which time it will complete whatmight be termed the cutting movement. As soon as the dog Z engages thelever m, the belts will be shifted to reverse the movement of the bed,and

at the same time the switch twill be thrown to the right which willbreak the circuit to the solenoid 21 and close the circuit to thesolenoid 28. This energizing of the solenoid 28 will withdraw the lever26 from under the projection 241 and permit the core of the I solenoid21 to drop by gravity. This dropping by gravity of the core of thesolenoid 21 will throw the hooked arm of the lever 20 into contact withthe periphery of the sleeve 15 and withdraw the other lever from underthe first projection 19. This move ment of the escape-ment lever willpermit the springs 14 to become active and shift the rollers 16 to lockthe pulley 12 to the clutch member 13 so that the shaft 11 will berotated 180 degrees until the second projection 19 is engaged bythehooked member on the escapement lever 20, which will-arrest themovement of the clutch member :15 and at which time theproj ections 8will shift the rollers .16-to-di=sengage the clutch- :This

movement of the shaft 11 through the medium ofgearslO and 6; will rotatethe disk- 7 approximately 180 degrees and which will in turn through theaction of the sector 2 actuate the pinion w to move the ratchetmechanism into a position to shift the tool at the next movement. Theplaner bed is now returned to move the work piece idly under the tool a,and at the end of this movement the dog Z will again shift the leverm,which will again reverse the belts and shift the lever t which willfirst break the circuit to the solenoid 28 and close the circuit to thesolenoid 21. This energizing of the solenoid 21 will shift theescapement 20 to the position shown in Fig. 2 which will again permitthe shaft 11 to be rotated 180 degrees, and immediately after the lever22 is raised by the core of the solenoid 21 the lever 26 will drop intothe position shown in Fig. 2 to prevent the lever 22 and the core of thesolenoid 21 from dropping if the circuit to the solenoid 21 is brokenbefore the table reaches the limit of its next movement which mightoccur if the operator should stop the machine during a cut, as he wouldthen break the circuit to the solenoid 21.

If the lock or latch were not provided, the feeding mechanism would beshifted as soon as the circuit to the solenoid 21 was broken, whichwould throw the feeding mechanism out of timed relation.

If it is desired to cut out the automatic feed for any reason, it isonly necessary to open switch 31, to break .the circuit to solenoid 28,and lock the escapement, and

when the switch is again closed the automatic feed will be restored inproper relation to the table reciprocating mechanism.

The advantages of my invention result from the provision of anintermittently actuated tool feeding device in connection with anelectrically actuated escapement to prevent the escapement from actinguntil after the table has been moved to a predetermined point, toprevent the tool' feeding mechanism from getting out of timed relationwith the table reciprocating mechanism.

Having now fully described my invention, what I claim and desire toprotect by Letters Patent is 1. 'A metal working machine comprisingmeans for reciprocating the cutting tool and the piece to be cutrelative to each other, means for reversing the motion at the end ofeach stroke, electrically controlled feeding mechanism for shifting thecutting tool at the end of each complete reciprocation, and means forpreventin the electrically controlled feeding mechamsm from gettingmeans.

outof timed-relation with the reciprocating 2; A :metalcutting 'machine2 comprising means forrreciprocating. the cutting tool and therpiece'to' be out. relative to each other, means for-reversing the; motion atthe end offeachstroke,intermittently actuated feed-. ing mechanism for,shifting the cutting "tool just prior to the beginning of each cut, andan electrically controlled device for preventing the feeding means fromgetting out of timed relation with the reciprocating means. 3. In adevice of the character described, an intermittently actuated toolfeeding mechanism, an escapement adapted to permit actuation of saidfeeding mechanism, and electrically operated means adapted to controlthe escapement.

4. .In a device of the character described, an intermittently actuatedfeeding mechanism, an escapement, a lever therefor, electrical means formoving the escapement lever in one direction, means permitting the leverto move in the other direction, and an electrically actuated lock forthe escapement.

5. A metal planer having a reciprocating table, means for reciprocatingsaid table including reversing mechanism, intermittently actuated toolfeeding mechanism, anescapement for controlling the feeding mechanism,an escapement lever, a solenoid for actuating the escapement lever inone direction,

said escapement lever being arranged to be moved in the other directionby gravity, an electrically controlled lock for preventing the movementof the escapement under the force of gravity, and electrical switchescontrolled by the reversing mechanism for actuating the solenoid and theelectrically controlled lock.

6. A planer having a moving table, means for reciprocating. said tableincluding reversing mechanism, a cutting tool, intermittently actuatedmechanism for moving said tool at the beginning of each cutting stroke,anescapement for controlling the intermittently actuated mechanism, anescapement lever, a solenoid for actuating said escapement lever in onedirection said escapement lever being arranged to be moved in the otherdirection by gravity, 3. switch for controlling the current to saidsolenoid, a lock for preventing the escapement lever from moving underthe force of gravity, a solenoid for shifting said look, a second switchfor closing the circuit through the lock solenoid, and means controlledby the reversing mechanism for actuating said switches.

7. A planer having a moving table, means for reciprocating said tableincludingreversing mechanism, a cutting tool, intermittently actuatedmechanism for moving, said tool at the beginning of each cutting stroke,an escapement for controlling the intermittently actuated mechanism, anescapement lever, a

solenoid for actuating said escapement lever through the lock, solenoid,means controlled in one direction, said escapement lever being by thereversing mechanism for actuating 10 arranged to be moved in 'the otherdirection said switches, and a third switch for controlby gravity, aswitch for controlling the curling the circuit to the lock solenoid.rent to said solenoid, a lock for preventing In testimony of whichinvention, 1 have .the escapement lever from moving under the hereuntoset'my hand, at Philadelphia, Pa.,

force of gravity, a solenoid for shifting said on this 16th day of June,1920.: 1ock,a second switch for closing the circuit r GEO. H. BENZOMJRQ

